Chemical News and Journal of Industrial Science, Tomy 99-100Chemical news office., 1909 |
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Strona 3
... cent of iron and other impurities . Adding a few drops of ammonium sulphide to the moist acids should not blacken them ( lead or iron ) . The acids not ignited or strongly heated ought to be perfectly soluble in a hot solution ...
... cent of iron and other impurities . Adding a few drops of ammonium sulphide to the moist acids should not blacken them ( lead or iron ) . The acids not ignited or strongly heated ought to be perfectly soluble in a hot solution ...
Strona 4
... cent . That the nitride does not consist of magnesium nitride is evident from the following considerations : - When magnesium burns in air , either as the powder or the ribbon , less than 1 per cent of nitride is obtained , and when an ...
... cent . That the nitride does not consist of magnesium nitride is evident from the following considerations : - When magnesium burns in air , either as the powder or the ribbon , less than 1 per cent of nitride is obtained , and when an ...
Strona 6
... cent ; hydrogen = 7.83 per cent . Calculated for C6H6 - Carbon = 92:31 per cent ; hydrogen 7.69 per cent . A combustion - tube of the same dimensions may be used for estimating nitrogen by the direct method . In this case a current of ...
... cent ; hydrogen = 7.83 per cent . Calculated for C6H6 - Carbon = 92:31 per cent ; hydrogen 7.69 per cent . A combustion - tube of the same dimensions may be used for estimating nitrogen by the direct method . In this case a current of ...
Strona 7
... cent halogen ) . This operation should be extended over at least thirty minutes . Toward the end of the operation maintain the solution at the boiling point by means of a Bunsen burner , and when the introduction of the sodium is ...
... cent halogen ) . This operation should be extended over at least thirty minutes . Toward the end of the operation maintain the solution at the boiling point by means of a Bunsen burner , and when the introduction of the sodium is ...
Strona 21
... cent chloroform solution . The purification of the esters was accomplished , as previously , by two successive distillations in a vacuum ; the boiling - point of each sample was 210-2120 / 20 mm . - In 10 per cent chloroform solution ...
... cent chloroform solution . The purification of the esters was accomplished , as previously , by two successive distillations in a vacuum ; the boiling - point of each sample was 210-2120 / 20 mm . - In 10 per cent chloroform solution ...
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